초록 ▼

The present invention is a failure mode detection system for use in an anti-lock braking system which comprises a network of fluid level and fluid pressure responsive switches and logic circuitry connected to detect and analyze operating parameters of the adaptive braking system and generate a plura

The present invention is a failure mode detection system for use in an anti-lock braking system which comprises a network of fluid level and fluid pressure responsive switches and logic circuitry connected to detect and analyze operating parameters of the adaptive braking system and generate a plurality of output signals for indicating and/or modifying operation of the braking system on the basis of detected failures therein.

대표청구항 ▼

A failure detection circuit for use in an anti-lock braking system which includes a master cylinder having primary, secondary and boost cylinders connected to primary and secondary hydraulic circuits, respectively, each hydraulic circuit including at least one wheel cylinder, hydraulic booster means

A failure detection circuit for use in an anti-lock braking system which includes a master cylinder having primary, secondary and boost cylinders connected to primary and secondary hydraulic circuits, respectively, each hydraulic circuit including at least one wheel cylinder, hydraulic booster means including a pump, accumulator, and manually modulated valve means for selectively applying a pressurized brake fluid to said master cylinder, and an anti-lock control system for sensing the rotational behavior of the wheels of a vehicle associated with said wheel cylinders in response to braking thereof and generating a plurality of braking control signals in response thereto, said anti-lock control system further including anti-lock modulator valve means associated with said wheel cylinders and responsive to said control signals to modulate application of braking pressure thereto, the circuit comprising a primary differential pressure switch connected between said secondary hydraulic circuit and one of said boost cylinder said said primary hydraulic circuit to operate from a normal to an operated state in response to a predetermined pressure differential therebetween, a secondary differential pressure switch connected between one of said secondary and said primary hydraulic circuits and said boost cylinder to operate from a normal to an operated state in response to a predetermined pressure differential therebetween, and a low pressure switch connected to said booster means and operable in response to a predetermined minimum pressure therefrom, said primary and secondary differential pressure switches and said pressure switch generating primary and secondary differential pressure signals and a low pressure signal, respectively, said anti-lock control system including computing circuit means responsive to the output of said primary and secondary differential pressure switches and said pressure sensing switch to either enable or disable said anti-lock control system as a function of the logical combinations of the outputs of said primary and secondary differential pressure switches and said low pressure switch.